Fuel Metering Pump 12V D2/D4/B4

OEM Fuel Metering Pump for Espar Airtronic D2, D4 & B4 Heaters (12V)

Restore precise fuel delivery to your Espar Airtronic heater with this direct-replacement 12V Fuel Metering Pump (FMP). Compatible with the diesel D2 and D4 as well as the gas B4 Airtronic models, this OEM-quality pump is the go-to fix when your heater struggles to start, runs inconsistently, or shuts down unexpectedly.

Key Features

• Direct OEM replacement — installs without modification
• Delivers accurate, consistent fuel metering for efficient combustion
• Restores reliable cold-weather starting and steady heat output
• Compatible with both diesel and gas Airtronic heater variants
• Built to Espar/Eberspächer quality standards

Compatibility

• Espar Airtronic D2 (Diesel, 12V)
• Espar Airtronic D4 (Diesel, 12V)
• Espar Airtronic B4 (Gas, 12V)

If your fuel metering pump is not clicking and your heater is not starting, this replacement pump is likely the fix you need.